Description

1-Pyrazolidinecarbonyl Chloride, 3-Oxo- (9Ci) is a reactive heterocyclic acid chloride derivative, identified by CAS number 54944-89-7. This compound serves as a critical building block in organic synthesis, enabling the efficient introduction of the 3-oxopyrazolidine-1-carbonyl moiety. It is primarily utilized by research chemists and process development scientists in the pharmaceutical and agrochemical industries for the synthesis of novel active ingredients and complex intermediates.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of novel drug candidates, particularly those targeting central nervous system (CNS) disorders and metabolic diseases.
• Agrochemical Synthesis: Used in the development of advanced herbicides, fungicides, and plant growth regulators.
• Peptidomimetic Chemistry: Employed to construct constrained peptide analogs and protease inhibitors due to its heterocyclic scaffold.
• Material Science Research: Acts as a monomer or cross-linking agent in the development of specialized polymers with unique thermal or mechanical properties.
• Chemical Biology Probes: Useful for labeling biomolecules or creating activity-based probes for enzyme studies.
• Academic & Contract Research: A valuable reagent for methodological development and exploratory synthesis in university and CRO laboratories.

Basic Information

Item	Detail
Product Name	1-Pyrazolidinecarbonyl Chloride, 3-Oxo- (9Ci)
CAS No.	54944-89-7
Molecular Formula	C4H5ClN2O2
Molecular Weight	148.55 g/mol
Synonyms	3-Oxopyrazolidine-1-carbonyl chloride; 1-(Chlorocarbonyl)-3-pyrazolidinone; 3-Oxo-1-pyrazolidinecarbonyl chloride; 1-Carbamoyl-3-pyrazolidinone chloride; Pyrazolidine-1-carbonyl chloride, 3-oxo-; 3-Oxopyrazolidine-1-carboxylic acid chloride
EINECS	Contact for details

Quality Control

Our production of 1-Pyrazolidinecarbonyl Chloride, 3-Oxo- (9Ci) adheres to stringent internal quality standards to ensure batch-to-batch consistency and reliability for your synthetic processes. Each lot is analyzed using advanced techniques including HPLC, NMR, and IR spectroscopy to confirm identity and purity. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent decomposition. Keep away from strong acids and incompatible organic solvents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.